Tie In Movies

I think Marvel and Disney did a brilliant job to build towards the Avengers movie. The two Iron Man movies, along with the Thor and Captain America movies all provided origin stories and a fan base that was ready for an Avengers Movie. They made sure all the earlier movies were available on Netflix

The result was over $1.5 Billion in worldwide gross sales.

DC hasn't done as good of a job with their super heroes. The Superman, Batman, and Green Lantern movies don't seem to lead to a Justice League movie.

What other series would make a good "funnel" like Marvel and Disney did with the Avengers?